West Nile Virus, National Wildlife Health Center, Biological Resources Division, USGS, U.S. Department of the Interior
Data Center Description
Since the West Nile Virus (WNV) was discovered in the Western Hemisphere it has spread rapidly across North America, affecting thousands of birds, horses, and humans. In only five years, WNV has swept through the New York City region in 1999 to almost all of the continental U.S., 7 Canadian provinces, and throughout Mexico and parts of the Caribbean by 2004.
The USGS, CDC and other agencies are committed to understanding the effects of WNV. These agencies are trying to understand this disease and how it could produce such a large amount in just the last five years since it arrived in New York City. WNV has been detected in at least 48 species of mosquitoes, over 250 species of birds, and at least 18 species of mammals, including humans.